Stop mechanism for phonographs.



G. H. TAGGART. STOP MECHANISM FOR PHONOGRAPHS. APPLICATION FILED AUG.21, 1911.

1,080,386. Patented Dec. 2, 1913.

. 2 SHEETS-SHEET 1. fly. 1.

,szwzm G. H. TAGGART. STOP MECHANISM FOR PHONOGRAPHS. APPLICATION FILEDAUG.21, 1911.

1,080,386. Patented Dec.2, 1913.

2 SHEETS-SHEET 2.

GEORGE H. TAGGART, OF BUFFALO, NEW YORK.

STOP MECHANISM FOR PHONOGRAPHS.

Application filed August 21, 1911. Serial No. MSDGQR 1 Specification ofLetters Patent.

FatentcdHt-QTL17E), a.

To all whom it may concern: V

Be it known that I, Gnouon H. TAGGART, a citizen of the United States,residing at Buffalo, in the county oi? Erie and State of" New York, haveinvented a new and useful Improvement in Step Mechanism for Phonographs,of which the following is a specification.

This invention relates to mechanisms for automatically stopping themotion 01 phonographs, graphophones, or analogous mechanical musicalinstruments, when the stay lus or needle of the instrument reaches theend of the record.

The objects of the invention are to produce a practical and efficientstop mechanism of simple and durable cmistruction for phonographs ofthat type in which the record is formed on a flat rotary disk; and alsoto provide a stop mechanism for phonographs and analogous instrumentswhich can be readily set or adjusted for each record so as to stop theinstrument as soon as the stylus or needle reaches the end (If therecord, regardless of the length thereof, or of the point on the disk atwhich the record terminates,

In the accompanying drawings Figure 1 is a fragmentary plan view of aphonograph provided with a stop mechanism embodying the invention. Fig.2 is a fragmentary sectional plan view thereof on line 2-2, Fig. 7,showing the stop mechanism. Fig. 3 is a similar plan view, showing adill'erent position oi the parts. .l igs. +1, (3 and 7 are tiragmentarysectional elevations on line 4t-- l-, l ig. 1, showing the parts in someof the dilterent positions which they occupy during the operation of themechanism. Fig. 8 'is an elevation of the latch ot' the stop mechanism.l ig. t) is a fragmentary elevation showing the brake re, asing arm.

Like reference characters rctcr to like parts in. the several figures.

The invention is shown in the drawings and described as applied to aphonograph provided with a [lat record disk, but it will be understoodthat the stop mechanism could be readily adapted for use with machinesof other types. 1

A represents the usual box or easing of the machine, B the rotary tableon which the record disk 7) is supported, and C the needle arm which ispivoted at c to sw'ng horizontally over the table l3, and carries at itsend the usual sound producing device pro-' vided with a stylus or needle0' adapted to follow the spiral groove on the surface of the record diskI). All of these parts may be 01 the usual or any suitableconstructitni.

I) represents a brake adapted to bear against the rotary table forstopping it. The brake shown consists of a lever pivoted at (Z on thestationary casing of the machine, and having a brake shoe (5 pivoted onone arm. A spring d attached to the opposite arm of the lever tends toswing the lever on 1ts pivot so as to press the shoe. against the edgeof the rotary table 15. The brake is adapted to be held out of contactwith the table 13 by a brake releasing arm 1!] which is pivoted at c tothe casing A, and is preterably provided at its free end with a wheel orroller 0' adapted to roll onto a lace c on the brake lever which iscurved substantially concentric with the pivot of the releasing arm. Thebrake lever I) and the releasing arm E are so located with regard toeach other that when the wheel 1/ rid es onto the curved face c thebrake shoe will be moved out of contact with the rotary table againstthe action of the spring (1 The end a of the curved face c is slightlyraised or eccentric which prevents the roller from accidentally rollingoil of the brake lever so that a slight force is rctpiired to disengagethe releasing arm from the brake lever amt apply the brake. The relasing arm E and the wheel 0' together not in the same manner as a togglemechanism, which facilitates the swinging (if the brake lever .l) on itspivot against the action of the spring (1. The brake may be of otherconstruction adapted to be released and applied by the movement of thereleasing arm into and out ot' enga ijement therewith.

The brake releasing arm is adapted to be moved out of and into cngaagenmit with the brake lever for applying and releasing the brake byfingers l and (i which depend from the needle arm at opposite sides ofthe releasing arm. \Vhen the needle arm is moved outwardly or toward theedge t' the record disk to commence a re n-iu'hu-tion the tingrr G movesthe releasing arm in the direction to release the brake and in theinward movement of the needle arm when the stylus reaches the end of therecord, the other finger F moves the releasing arm in the dt rection toapply the brake. The (inter F is in its action and has the advantagethat it can be adjusted to stop the machine after the completion of anyrecord, regardless of its length. The mechanism is very easy to operate,since it is only necessary, after placinga new record on the machine, tomove the needle arm toward the outer edge of the disk and then towardthe inner edge of the disk till the stylus reaches the point at which itis desired to stop the machine. These two movements complete the settingof the stop mechanism and the machine can then be started in the usualway.

If desired the record disks can be provided with marks or devices of anyappropriate sort indicating where the records thereon terminate, andthus facilitate the adjustment of the stop mechanism.

The described construction of the mechanism by which it can be adjustedas required for records of different lengths, adapt it for use with therecord disks as ordinarily made without any change therein. I however,specially formed record disks a e used having the record grooves on allof the disks terminating at the same distance from the center thereof,there would be no necessity for making the actuating finger F for thereleasing arm adjustable, as in such case the stylus and the finger Fwould always move inwardly to the said point to apply the brake. A stopmechanism having the brake, and brake releasing arm arranged to beoperated as described by fingers carried by the needle arm, would,therefore, be useful irrespective of the adjustability of the finger F.

I claim as my invention:

1. The combination with an instrument having a driven rotating deviceand an arm which traverses said rotating device, of stop mechanism forsaid rotating device comprising a pivoted spring-actuatcd b 'ake leveradapted to swing on its pivot into and out of engagement with saidrotating device, a releasing device pivoted on a stationary part of saidinstrui'ncnt, a wheel of rela' tively large diameter pivoted on saidreleasing device. said releasing device heingada 'it ed to be swung onits pivot to move said wheel into and out of engagement with said brakelever for controlling respectively the. releasing and applying of thesame, and means operated by said arm for actuating said releasingdevice, said releasing device and wheel togcthe acting as a togglemechanism to facilitate the swinging of said brake lever on its pivot,substantially as set forth.

2. The con'ibination with an instrument having a driven rotating deviceand a swinging arm which traverses said rotating device, of stopmechanism for said rotating device comprising a spring-actuated brake, areleasing arm pivoted at one end on a stationary part of saidinstrument, a wheelpivoted on the other end of said releasing arm,

said brake having a face which is substantially concentric with thepivot of said brake releasing arm, said releasing arm being adapted tobe swung on its pivot to move said wheel into and out of engagement withsaid concentric face for control ling respectively the releasing andapplymg of said b aim, the concentric face of the brake being providedwith a slightly raised end portion which resists the rolling off of saidwheel from said face, and means connectcd to said swinging arm whichmove said releasing arm to cause the brake to be released when theswinging'arm is moved to commence the operation of said instrument andto cause the brake to be applied, substantially as set forth.

3. The combination with an instrument having a driven rotating deviceand a swinging arm which traverses said rotating device, of stopmechanism for said rotating device comprising a spring-actuated brake, areleasing arm pivoted at one end on a stationary part of saidinstrument, a wheel pivoted on the other end of said releasing arm, saidbrake having a face which is sub stantially concentric with the pivot ofsaid brake releasing arm, said releasing arm being adapted to be swungon its pivot to move said wheel into and out of engage ment with saidconcentric face for controlling respectively the releasing and applyingof said brake, the concentric face of the brake being provided with aslightly raised end portion which resists the rolling off of said wheelfrom said face, and means connected to said swinging arm which move saidreleasing arm to a position at which the point of contact of said wheelis beyond the raised position of the concentric face of the brake, tocause the wheel in roll out of engagement; with the brake and therebycause the brake to be applied, sub; intially as set forth.

4'. The combination of an inst raiucnt having a driven rotating deviceand a swinging arm which traverses said rotating device, of stopmechanism for said rotating device comprising a brake, a releasing armwlxl h is pivoted at one end on a stationary part of said instrument, awheel pivoted on the other end of said releasing arm, said brake havinga curved face on which said wheel is adapted to engage, and actuatingdevices carried by the swinging arm which are adapted to engage onopposite sides of said releasing arm and one of which actuates thereleasing arm to cause the brake to be released when the swinging arm ismoved in one direction, and the other of which actuates the releas ingarm to cause the brake to be applied when the swinging arm is moved inthe opposite direction, substantially as set forth.

5. The combination with an instrument having a driven rotating deviceand a swinging device which traverses said rotating device, of stopmechanism for the instrument comprising a stop device and actuatingdevices which are movable with the swinging device for causing thereleasing and applying of said stop device by opposite movements of theswinging device, one of said actuating devices being slidably arrangedon the swinging device and adapted to be held in a set position forcausing said stop device to be applied to said rotating device at anydesired position of said swinging device, substantially as set forth.

6. The combination with an instrument having a driven rotating deviceand a swinging device which traverses said rotating device, of stopmechanism for the instrument comprising a stop device and fingers,carried by the swinging device for causing the releasing and applying ofsaid stop device by opposite movements of the swinging device, one ofsaid fingers being slidably arranged on said swinging device and adaptedto be held in a set position for causing the stop device to be appliedto said rotating device at any desired position of said swinging device,substantially as set forth. 7. The combination with an instrument havina driven rotar device and a swin b O 'for adjusting the same by themovement of said swinging device, substantially as set forth.

8. The.c0mbinati0n with an instrument having a driven rotary device anda swinging device which traverses said rotary device, of stop mechanismfor the instrument comprising a stop device, fingers carried by theswinging device for causing said stop device to be released and appliedby oppo site movements of the swinging device, one of said fingers beingadjustable relatively to the swinging device for regulating theoperation of the said stop device with respect to the desired movementof the swinging de- 7 Vice, a latch for holding said adjustable fingerduring the movement of the swinging device in one direction, means foradjusting said finger by the movement of the swinging device in theopposite direction, and means for actuating said latch to engage andrelease said adjustable finger, substantiallyas set forth.

9. The combination with an instrument having a driven rotary device andan arm which traverses said rotary devlce, of stop mechanism for therotary device comprising which traverses said rotary device, of stopmechanism for the rotary device comprising a brake, a releasing devicewhich is pivoted to a stationary part of said instrument, a wheelpivoted on said releasing device, said releasing device being adapted tobe swung on'its pivot to move said wheel into and out of engagement withsaid brake for causing the releasing and applying thereof, fingersprojecting from said arm at opposite sides of said releasing devicefol-actuating the same, one of said fingers being adjustable, means forshifting said adjustable finger when the arm is moved in one direction,

a latch which is moved by said releasing device to hold said adjustablefinger, and means for releasing said latch, substantially as set forth.

11. The combination with an instrument having a driven rotating deviceand a swinging device which traverses said rotating device, of stopmechanism for said rotating device comprising'a brake lever, a releasingarm pivoted on a stationary part of said instrument and provided with awheel of relatively large diameter adapted to roll into and out ofengagement with said brake lever for shifting the brake lever forreleasing and applying of the brake to said rotating device, saidreleasing device and wheel together acting as a toggle mechanism tofacilitate the shifting of the brake lever, devices movable with saidswinging device for actuating said releasing arm, and

means for yieldingly holding the wheel of said releasing arm inengagement with said brake levcr' until actuated by one of said movabledevices. substantially as set forth. 12. The combination with aninstrument having a driven rotating device and an arm which traversessaid rotating device, of stop mechanism for said rotating device comprising a spring actuated brake, a releasing arm pivoted at one end on astationary part of said instrument, a wheel pivoted on the other end ofsaid'releasing device, said re-f leasing device bein adapted to beswung" on its pivot to move said wheel'into and-- out of engagement withthe brake for releasing and applying the brake, a raised per- \Vitnessmy hand this 18th day of Autmn on said brake which resists the rollinggust, 1911. ofi' 0f the wheel from engagement with said brake, and meansconnected to the swinging GEORGE TAGGARP' 1I1!1 'f()l moving thereleasing device into Witnesses:

and out of engagement with the brake, sub- C. N. PARKER,

stantially as set forth. C. B. HORNBECK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

